/usr/bin/over is in enscript 1.6.5.90-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 | #!/bin/sh
librarydir=/usr/share/enscript
enscript -E -p- --quiet --language=overstrike "$@" 2>&1 | sensible-pager
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